Answer to Question #260679 in Civil and Environmental Engineering for angel

Question

What effect does MnO2 have on the reaction rate of the decomposition of hydrogen peroxide?

Answer 1

Manganese dioxide catalyzes the decomposition of hydrogen peroxide to oxygen and water. Since manganese dioxide is a catalyst, it is not consumed in the reaction. Normally the activation energy for this uncatalyzed reaction is around 75 KJ/mole (Moelwyn-Hughes).